Ye Xiong was an ordinary person in modern society. He accidentally traveled to the period of the Anti-Japanese War. He was at the bottom of the class and faced the brutal invasion of the Japanese army and the plight of extreme lack of resources. He carries the CrossFire system, which displays task lists, skill trees and experience points in a game-like interface to help him grow. As an agent of the villain, the Japanese army sensed Ye Xiong's threat and constantly encircled and suppressed him and his team, hindering their development. Ye Xiong received an impossible mission issued by the system. He had to break through the ranks in a short period of time and lead a group of soldiers who were initially poorly equipped and poorly trained to win the war of resistance. During the process, Ye Xiong faced a dilemma. The Japanese army tempted him with glory and wealth. If he accepted, he would gain, but his firm belief in resisting Japan made him refuse decisively. At the same time, due to his special style of acting, he was misunderstood by some Chinese people as colluding with the Japanese army and suffered misunderstandings. As the battle progressed, every victory was accompanied by the sacrifice of soldiers, which made Ye Xiong feel deeply bitter. However, under the countdown threat of the Japanese invasion, and amid numerous obstacles in the harsh war environment, Ye Xiong relied on his tenacity and system assistance to continuously upgrade and become stronger, changing the situation.